706 



SYSTEMATIC BOTANY. 



Placentas parietal. 

 Anthers 2-celled. Capsule 1-cellecl . . Xyiidacece. 2G5. 

 Anthers 1-celIed. Capsule 1-celled . . Mayacece. 263. 

 The outer and inner whorls of the perianth 

 alike. 

 Flowers on a spadix. Embi-yo with a lateral 



slit Orontiacece. 268. 



Flowers not on a spadix. Embryo Avithout 



a slit Juncacece. 267. 



b. Outer ivhorl of the penanth petaloid, or the 

 whole petaloid when only one whorl is present. 

 Carpels more or less distinct. 

 Seeds solitary. Flowers on a spadix . . Palmaceae. 269. 

 Seeds numerous. Flowers not on a spadix. 



Anthers extrorse Melanthacece. 260. 



Anthers introrse. 

 Perianth of 6 parts. Seeds without al- 

 bumen BiitomacecE. 272. 



Perianth of 2 parts. Seeds with albumen Philydraceoe. 266. 

 Carpels combined. 



Peiiauth rolled inwards after flower- 

 ing. Aquatics .... Pontederacece. 262. 

 Perianth not rolled inwards after 

 flowering. Perianth minute, with 

 coloured bracts externally . . Gilliesiacece. 261. 

 Perianth not rolled inwards after 

 flowering, conspicuous, without 

 coloured bracts .... Liliaceoe. 259. 



2. Flowers either naked, or with a whorled scaly Perianth, 



GENERALLY UNISEXUAL {DicUnes). 



A. Flowers on a spadix. 



a. Flowers bisexual. 



Embryo cleft Orontiacece. 268. 



Embi-yo solid Pandanacece. 273. 



b. Flowers unisexual. 



Embryo solid Pandanacece. 273. 



Embryo cleft on one side. 



Flowers with a true spathe. Fruit succulent. 



Anthers sessile, or nearly so . . . Aracece. 275. 

 Flowers without a true spathe. Fruit dry. 

 Anthers on long filaments . . . Typhacece, 274. 



B. Flowers not arranged on an evident spadix. 



a. Flowers bisexual. 



Ovary superior Juncaginacece. 270. 



Ovary inferior Hydrocharidacece. 280. 



b. Floners unisexual. 



Ovules erect. 

 Embryo perfect. 

 Seed without albumen . . . Naiadaceoe. 277. 

 Seed with albumen .... Pistiacece. 276. 

 Embryo rudimentary .... Triuridaceoe. 279. 

 Ovules pendulous. 

 Carpel solitary. 

 Seed without albumen. 



Pollen globose Naiadacece. 277. 



Pollen filamentous or confervoid . . Zosteracece. 278. 



Seed with albumen Restiacece. 281. 



Carpels several, distinct. 



Anthers 2-celled. Embryo cleft . . Naiadacece. 277. 

 Anthers 1-celled. Embryo solid . . Descawxiacece, 283. 



